1887

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Volume 64, Issue 7

Limited genetic diversity and extensive antimicrobial resistance in clinical isolates of in north-east Iran Free

Abstract

This study determined the mechanisms and patterns of antimicrobial resistance among the isolates obtained from different wards of a teaching hospital in the city of Mashhad in north-east Iran. Between January 2012 and the end of June 2012, 36 isolates of were collected from different wards of Ghaem Hospital. Antimicrobial susceptibility testing and epsilometer testing (E-test) were performed. The genetic resistance determinants of A, B and D classes of β-lactamases, aminoglycoside modifying enzymes (AMEs), efflux pumps and IS elements were assessed by PCR. Repetitive extragenic palindromic element (REP)-PCR was performed to find the genetic relatedness of the isolates. Colistin was the most effective antibiotic of those tested, where all isolates were susceptible. E-test results revealed high rates of resistance to imipenem, ceftazidime and ciprofloxacin. The majority of isolates (97  %) were multidrug-resistant. , and genes were detected in all isolates, but , and were not detected. The prevalence of , , , and were 64, 95, 61, 64 and 86  %, respectively. IS was found to be inserted into the 5′ end of in 35 isolates (97  %). Of the AMEs, (89  %) was the most prevalent, followed by (75  %). The band patterns reproduced by REP-PCR showed that 34 out of 36 isolates belonged to one clone and two singletons were identified. The results confirmed that refractory isolates were widely distributed and warned the hospital infection control team to exert strict measures to control the infection. An urgent surveillance system should be implemented.

  • Received:
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© 2015 The Authors
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2015-07-01
2024-04-19
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Limited genetic diversity and extensive antimicrobial resistance in clinical isolates of Acinetobacter baumannii in north-east Iran
J. Med. Microbiol. 64, 767 (2015); https://doi.org/10.1099/jmm.0.000090
/content/journal/jmm/10.1099/jmm.0.000090
/content/journal/jmm/10.1099/jmm.0.000090
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